Lines Matching +full:syscon +full:- +full:dev
1 // SPDX-License-Identifier: GPL-2.0
3 * pci-j721e - PCIe controller driver for TI's J721E SoCs
5 * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com
10 #include <linux/clk-provider.h>
17 #include <linux/mfd/syscon.h>
26 #include "pcie-cadence.h"
85 return readl(pcie->user_cfg_base + offset); in j721e_pcie_user_readl()
91 writel(value, pcie->user_cfg_base + offset); in j721e_pcie_user_writel()
96 return readl(pcie->intd_cfg_base + offset); in j721e_pcie_intd_readl()
102 writel(value, pcie->intd_cfg_base + offset); in j721e_pcie_intd_writel()
108 struct device *dev = pcie->cdns_pcie->dev; in j721e_pcie_link_irq_handler() local
112 if (!(reg & pcie->linkdown_irq_regfield)) in j721e_pcie_link_irq_handler()
115 dev_err(dev, "LINK DOWN!\n"); in j721e_pcie_link_irq_handler()
117 j721e_pcie_intd_writel(pcie, STATUS_CLR_REG_SYS_2, pcie->linkdown_irq_regfield); in j721e_pcie_link_irq_handler()
126 reg |= pcie->linkdown_irq_regfield; in j721e_pcie_disable_link_irq()
135 reg |= pcie->linkdown_irq_regfield; in j721e_pcie_config_link_irq()
141 struct j721e_pcie *pcie = dev_get_drvdata(cdns_pcie->dev); in j721e_pcie_start_link()
153 struct j721e_pcie *pcie = dev_get_drvdata(cdns_pcie->dev); in j721e_pcie_stop_link()
163 struct j721e_pcie *pcie = dev_get_drvdata(cdns_pcie->dev); in j721e_pcie_link_up()
176 static int j721e_pcie_set_mode(struct j721e_pcie *pcie, struct regmap *syscon, in j721e_pcie_set_mode() argument
179 struct device *dev = pcie->cdns_pcie->dev; in j721e_pcie_set_mode() local
181 u32 mode = pcie->mode; in j721e_pcie_set_mode()
188 ret = regmap_update_bits(syscon, offset, mask, val); in j721e_pcie_set_mode()
190 dev_err(dev, "failed to set pcie mode\n"); in j721e_pcie_set_mode()
196 struct regmap *syscon, unsigned int offset) in j721e_pcie_set_link_speed() argument
198 struct device *dev = pcie->cdns_pcie->dev; in j721e_pcie_set_link_speed() local
199 struct device_node *np = dev->of_node; in j721e_pcie_set_link_speed()
208 val = link_speed - 1; in j721e_pcie_set_link_speed()
209 ret = regmap_update_bits(syscon, offset, GENERATION_SEL_MASK, val); in j721e_pcie_set_link_speed()
211 dev_err(dev, "failed to set link speed\n"); in j721e_pcie_set_link_speed()
217 struct regmap *syscon, unsigned int offset) in j721e_pcie_set_lane_count() argument
219 struct device *dev = pcie->cdns_pcie->dev; in j721e_pcie_set_lane_count() local
220 u32 lanes = pcie->num_lanes; in j721e_pcie_set_lane_count()
225 if (pcie->max_lanes == 4) in j721e_pcie_set_lane_count()
228 val = LANE_COUNT(lanes - 1); in j721e_pcie_set_lane_count()
229 ret = regmap_update_bits(syscon, offset, mask, val); in j721e_pcie_set_lane_count()
231 dev_err(dev, "failed to set link count\n"); in j721e_pcie_set_lane_count()
237 struct regmap *syscon) in j721e_enable_acspcie_refclk() argument
239 struct device *dev = pcie->cdns_pcie->dev; in j721e_enable_acspcie_refclk() local
240 struct device_node *node = dev->of_node; in j721e_enable_acspcie_refclk()
247 "ti,syscon-acspcie-proxy-ctrl", in j721e_enable_acspcie_refclk()
250 dev_err(dev, in j721e_enable_acspcie_refclk()
251 "ti,syscon-acspcie-proxy-ctrl has invalid arguments\n"); in j721e_enable_acspcie_refclk()
257 ret = regmap_update_bits(syscon, 0, mask, val); in j721e_enable_acspcie_refclk()
259 dev_err(dev, "failed to enable ACSPCIE refclk: %d\n", ret); in j721e_enable_acspcie_refclk()
268 struct device *dev = pcie->cdns_pcie->dev; in j721e_pcie_ctrl_init() local
269 struct device_node *node = dev->of_node; in j721e_pcie_ctrl_init()
272 struct regmap *syscon; in j721e_pcie_ctrl_init() local
275 syscon = syscon_regmap_lookup_by_phandle(node, "ti,syscon-pcie-ctrl"); in j721e_pcie_ctrl_init()
276 if (IS_ERR(syscon)) { in j721e_pcie_ctrl_init()
277 dev_err(dev, "Unable to get ti,syscon-pcie-ctrl regmap\n"); in j721e_pcie_ctrl_init()
278 return PTR_ERR(syscon); in j721e_pcie_ctrl_init()
282 ret = of_parse_phandle_with_fixed_args(node, "ti,syscon-pcie-ctrl", 1, in j721e_pcie_ctrl_init()
287 ret = j721e_pcie_set_mode(pcie, syscon, offset); in j721e_pcie_ctrl_init()
289 dev_err(dev, "Failed to set pci mode\n"); in j721e_pcie_ctrl_init()
293 ret = j721e_pcie_set_link_speed(pcie, syscon, offset); in j721e_pcie_ctrl_init()
295 dev_err(dev, "Failed to set link speed\n"); in j721e_pcie_ctrl_init()
299 ret = j721e_pcie_set_lane_count(pcie, syscon, offset); in j721e_pcie_ctrl_init()
301 dev_err(dev, "Failed to set num-lanes\n"); in j721e_pcie_ctrl_init()
306 syscon = syscon_regmap_lookup_by_phandle_optional(node, in j721e_pcie_ctrl_init()
307 "ti,syscon-acspcie-proxy-ctrl"); in j721e_pcie_ctrl_init()
308 if (!syscon) in j721e_pcie_ctrl_init()
311 return j721e_enable_acspcie_refclk(pcie, syscon); in j721e_pcie_ctrl_init()
406 .compatible = "ti,j721e-pcie-host",
410 .compatible = "ti,j721e-pcie-ep",
414 .compatible = "ti,j7200-pcie-host",
418 .compatible = "ti,j7200-pcie-ep",
422 .compatible = "ti,am64-pcie-host",
426 .compatible = "ti,am64-pcie-ep",
430 .compatible = "ti,j784s4-pcie-host",
434 .compatible = "ti,j784s4-pcie-ep",
438 .compatible = "ti,j722s-pcie-host",
446 struct device *dev = &pdev->dev; in j721e_pcie_probe() local
447 struct device_node *node = dev->of_node; in j721e_pcie_probe()
462 data = of_device_get_match_data(dev); in j721e_pcie_probe()
464 return -EINVAL; in j721e_pcie_probe()
466 mode = (u32)data->mode; in j721e_pcie_probe()
468 pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL); in j721e_pcie_probe()
470 return -ENOMEM; in j721e_pcie_probe()
475 return -ENODEV; in j721e_pcie_probe()
477 bridge = devm_pci_alloc_host_bridge(dev, sizeof(*rc)); in j721e_pcie_probe()
479 return -ENOMEM; in j721e_pcie_probe()
481 if (!data->byte_access_allowed) in j721e_pcie_probe()
482 bridge->ops = &cdns_ti_pcie_host_ops; in j721e_pcie_probe()
484 rc->quirk_retrain_flag = data->quirk_retrain_flag; in j721e_pcie_probe()
485 rc->quirk_detect_quiet_flag = data->quirk_detect_quiet_flag; in j721e_pcie_probe()
487 cdns_pcie = &rc->pcie; in j721e_pcie_probe()
488 cdns_pcie->dev = dev; in j721e_pcie_probe()
489 cdns_pcie->ops = &j721e_pcie_ops; in j721e_pcie_probe()
490 pcie->cdns_pcie = cdns_pcie; in j721e_pcie_probe()
494 return -ENODEV; in j721e_pcie_probe()
496 ep = devm_kzalloc(dev, sizeof(*ep), GFP_KERNEL); in j721e_pcie_probe()
498 return -ENOMEM; in j721e_pcie_probe()
500 ep->quirk_detect_quiet_flag = data->quirk_detect_quiet_flag; in j721e_pcie_probe()
501 ep->quirk_disable_flr = data->quirk_disable_flr; in j721e_pcie_probe()
503 cdns_pcie = &ep->pcie; in j721e_pcie_probe()
504 cdns_pcie->dev = dev; in j721e_pcie_probe()
505 cdns_pcie->ops = &j721e_pcie_ops; in j721e_pcie_probe()
506 pcie->cdns_pcie = cdns_pcie; in j721e_pcie_probe()
509 dev_err(dev, "INVALID device type %d\n", mode); in j721e_pcie_probe()
513 pcie->mode = mode; in j721e_pcie_probe()
514 pcie->linkdown_irq_regfield = data->linkdown_irq_regfield; in j721e_pcie_probe()
519 pcie->intd_cfg_base = base; in j721e_pcie_probe()
524 pcie->user_cfg_base = base; in j721e_pcie_probe()
526 ret = of_property_read_u32(node, "num-lanes", &num_lanes); in j721e_pcie_probe()
527 if (ret || num_lanes > data->max_lanes) { in j721e_pcie_probe()
528 dev_warn(dev, "num-lanes property not provided or invalid, setting num-lanes to 1\n"); in j721e_pcie_probe()
532 pcie->num_lanes = num_lanes; in j721e_pcie_probe()
533 pcie->max_lanes = data->max_lanes; in j721e_pcie_probe()
535 if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48))) in j721e_pcie_probe()
536 return -EINVAL; in j721e_pcie_probe()
542 dev_set_drvdata(dev, pcie); in j721e_pcie_probe()
543 pm_runtime_enable(dev); in j721e_pcie_probe()
544 ret = pm_runtime_get_sync(dev); in j721e_pcie_probe()
546 dev_err_probe(dev, ret, "pm_runtime_get_sync failed\n"); in j721e_pcie_probe()
552 dev_err_probe(dev, ret, "pm_runtime_get_sync failed\n"); in j721e_pcie_probe()
556 ret = devm_request_irq(dev, irq, j721e_pcie_link_irq_handler, 0, in j721e_pcie_probe()
557 "j721e-pcie-link-down-irq", pcie); in j721e_pcie_probe()
559 dev_err_probe(dev, ret, "failed to request link state IRQ %d\n", irq); in j721e_pcie_probe()
567 gpiod = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW); in j721e_pcie_probe()
569 ret = dev_err_probe(dev, PTR_ERR(gpiod), "Failed to get reset GPIO\n"); in j721e_pcie_probe()
572 pcie->reset_gpio = gpiod; in j721e_pcie_probe()
574 ret = cdns_pcie_init_phy(dev, cdns_pcie); in j721e_pcie_probe()
576 dev_err_probe(dev, ret, "Failed to init phy\n"); in j721e_pcie_probe()
580 clk = devm_clk_get_optional(dev, "pcie_refclk"); in j721e_pcie_probe()
582 ret = dev_err_probe(dev, PTR_ERR(clk), "failed to get pcie_refclk\n"); in j721e_pcie_probe()
588 dev_err_probe(dev, ret, "failed to enable pcie_refclk\n"); in j721e_pcie_probe()
591 pcie->refclk = clk; in j721e_pcie_probe()
607 clk_disable_unprepare(pcie->refclk); in j721e_pcie_probe()
613 ret = cdns_pcie_init_phy(dev, cdns_pcie); in j721e_pcie_probe()
615 dev_err_probe(dev, ret, "Failed to init phy\n"); in j721e_pcie_probe()
632 pm_runtime_put(dev); in j721e_pcie_probe()
633 pm_runtime_disable(dev); in j721e_pcie_probe()
641 struct cdns_pcie *cdns_pcie = pcie->cdns_pcie; in j721e_pcie_remove()
642 struct device *dev = &pdev->dev; in j721e_pcie_remove() local
646 if (pcie->mode == PCI_MODE_RC) { in j721e_pcie_remove()
654 gpiod_set_value_cansleep(pcie->reset_gpio, 0); in j721e_pcie_remove()
656 clk_disable_unprepare(pcie->refclk); in j721e_pcie_remove()
659 pm_runtime_put(dev); in j721e_pcie_remove()
660 pm_runtime_disable(dev); in j721e_pcie_remove()
663 static int j721e_pcie_suspend_noirq(struct device *dev) in j721e_pcie_suspend_noirq() argument
665 struct j721e_pcie *pcie = dev_get_drvdata(dev); in j721e_pcie_suspend_noirq()
667 if (pcie->mode == PCI_MODE_RC) { in j721e_pcie_suspend_noirq()
668 gpiod_set_value_cansleep(pcie->reset_gpio, 0); in j721e_pcie_suspend_noirq()
669 clk_disable_unprepare(pcie->refclk); in j721e_pcie_suspend_noirq()
672 cdns_pcie_disable_phy(pcie->cdns_pcie); in j721e_pcie_suspend_noirq()
677 static int j721e_pcie_resume_noirq(struct device *dev) in j721e_pcie_resume_noirq() argument
679 struct j721e_pcie *pcie = dev_get_drvdata(dev); in j721e_pcie_resume_noirq()
680 struct cdns_pcie *cdns_pcie = pcie->cdns_pcie; in j721e_pcie_resume_noirq()
693 ret = cdns_pcie_enable_phy(pcie->cdns_pcie); in j721e_pcie_resume_noirq()
697 if (pcie->mode == PCI_MODE_RC) { in j721e_pcie_resume_noirq()
700 ret = clk_prepare_enable(pcie->refclk); in j721e_pcie_resume_noirq()
711 if (pcie->reset_gpio) { in j721e_pcie_resume_noirq()
713 gpiod_set_value_cansleep(pcie->reset_gpio, 1); in j721e_pcie_resume_noirq()
718 clk_disable_unprepare(pcie->refclk); in j721e_pcie_resume_noirq()
727 rc->avail_ib_bar[bar] = true; in j721e_pcie_resume_noirq()
731 clk_disable_unprepare(pcie->refclk); in j721e_pcie_resume_noirq()
747 .name = "j721e-pcie",